diff --git a/curtains/src/main/java/curtains/Windows.kt b/curtains/src/main/java/curtains/Windows.kt
index 79c8106..8747ccc 100644
--- a/curtains/src/main/java/curtains/Windows.kt
+++ b/curtains/src/main/java/curtains/Windows.kt
@@ -48,6 +48,8 @@ val View.windowType: WindowType
       when {
         title == "Toast" -> TOAST
         title == tooltipString -> TOOLTIP
+        // App compat tooltip uses the class simple name.
+        title == "TooltipPopup" -> TOOLTIP
         title.startsWith("PopupWindow:") -> POPUP_WINDOW
         else -> UNKNOWN
       }